# print('hehe')
# x, y = 3, 6
# x, y = y, x
# print(x,y)
# if x == 3:
#    print('hehe')
# else:
#    print('haha')
# a = 'a'
# b = "d"
# c = 'asdf'
# print(type(a))
# print(type(b))
# print(type(c))
# print('哈哈哈“双引号”')
# print("你好~~‘单引号’~")
# a = input('输入数：')
# b = input('输入数：')
# a = int(a)
# b = int(b)
# print(f'a + b = {a + b}')

